chloroplast

简明释义

英[ˈklɒrəplɑːst]美[ˈklɔːrəplæst]

n. [植] 叶绿体

英英释义

单词用法

同义词

反义词

例句

1.The stoma size and chloroplast number in guard cells could be regarded as the reliable indicators of ploidy levels to identify seedlings in the early stage.

再生植株叶片气孔大小和气孔保卫细胞内叶绿体数目可以作为从再生植株中早期鉴别四倍体植株的可靠指标。

2.The stoma size and chloroplast number in guard cells could be regarded as the reliable indicators of ploidy levels to identify seedlings in the early stage.

再生植株叶片气孔大小和气孔保卫细胞内叶绿体数目可以作为从再生植株中早期鉴别四倍体植株的可靠指标。

3.Chlorophyll content was 1.2 SPAD, and the chloroplast did not develop, with only small vesicle-like structures.

结果发现叶绿素平均含量仅为1.2（SPAD），而叶绿体也不能正常发育仅有囊泡状结构。

4.The rice(Oryza sativa) chloroplast multicistron site integration expression vector will be transformed for expression into the tobacco chloroplast.

目的尝试水稻质体多顺反子定点整合表达载体转化到烟草质体中表达。

5.The outer of the two membranes around a chloroplast could be regarded as the host exclusion membranes.

围着叶绿体的外面两层膜，可以看作寄主排斥的膜。

6.The percentage of intact chloroplasts in the chloroplast preparations isolated by this method is usually over 80%.

在使用这种方法获得的叶绿体制剂中，完整叶绿体的百分数通常超过80％。

7.The structure of chloroplasts includes thylakoids and stroma.

叶绿体的结构包括类囊体和基质。

8.In plant cells, chloroplasts play a crucial role in photosynthesis.

在植物细胞中，叶绿体在光合作用中起着至关重要的作用。

9.Without chloroplasts, plants would not be able to convert sunlight into energy.

没有叶绿体，植物将无法将阳光转化为能量。

10.The green color of leaves is due to the presence of chloroplast.

叶子的绿色是由于叶绿体的存在。

11.Researchers are studying how chloroplasts can be used to produce biofuels.

研究人员正在研究如何利用叶绿体来生产生物燃料。

作文

The process of photosynthesis is vital for life on Earth, and at the heart of this process lies the chloroplast. These organelles are found in the cells of green plants and algae, and they play a crucial role in converting sunlight into energy. Without chloroplasts, plants would not be able to produce the glucose they need for growth, nor would they be able to release oxygen into the atmosphere, which is essential for the survival of most living organisms. Understanding the function and importance of chloroplasts helps us appreciate the intricate relationships within ecosystems.In essence, chloroplasts contain chlorophyll, the green pigment that captures light energy. This energy is then used to convert carbon dioxide and water into glucose and oxygen through a series of chemical reactions. This process not only sustains the plant itself but also provides energy for other organisms that rely on plants for food. For instance, herbivores consume plants, and in turn, carnivores eat those herbivores, creating a complex food web that supports various forms of life.Moreover, chloroplasts are unique because they have their own DNA, separate from the nuclear DNA of the cell. This characteristic suggests that they may have originated from free-living prokaryotic organisms that were engulfed by ancestral eukaryotic cells in a symbiotic relationship. This theory, known as endosymbiotic theory, highlights the evolutionary significance of chloroplasts and emphasizes their role in the development of complex life forms on Earth.In addition to their role in photosynthesis, chloroplasts are also involved in the synthesis of fatty acids and amino acids, which are essential for the growth and repair of plant tissues. They help in the production of secondary metabolites that can protect plants from herbivores and pathogens. Thus, chloroplasts contribute not only to the energy needs of the plant but also to its overall health and resilience against environmental stressors.As we face global challenges such as climate change and food security, understanding the role of chloroplasts becomes even more critical. Scientists are exploring ways to enhance the efficiency of photosynthesis in crops, which could lead to increased food production while minimizing the use of resources like water and fertilizers. By optimizing the function of chloroplasts, we may be able to develop more sustainable agricultural practices that support both human needs and environmental conservation.In conclusion, chloroplasts are not just simple organelles; they are fundamental to life on Earth. Their ability to harness sunlight and convert it into usable energy has far-reaching implications for all living organisms. From supporting food chains to influencing global carbon cycles, the significance of chloroplasts cannot be overstated. As we continue to study these remarkable structures, we uncover more about the delicate balance of our ecosystems and the importance of maintaining the health of our planet. By appreciating the role of chloroplasts, we can better understand the interconnectedness of life and the need for sustainable practices that protect our environment for future generations.

光合作用的过程对地球生命至关重要，而这一过程的核心就是叶绿体。这些细胞器存在于绿色植物和藻类的细胞中，它们在将阳光转化为能量方面发挥着关键作用。如果没有叶绿体，植物将无法产生生长所需的葡萄糖，也无法向大气中释放氧气，而这对大多数生物的生存都是必不可少的。理解叶绿体的功能和重要性有助于我们欣赏生态系统内部的复杂关系。本质上，叶绿体含有叶绿素，这种绿色色素捕获光能。然后，这种能量用于通过一系列化学反应将二氧化碳和水转化为葡萄糖和氧气。这一过程不仅维持了植物自身的生长，也为依赖植物作为食物的其他生物提供了能量。例如，食草动物食用植物，而肉食动物则捕食这些食草动物，从而形成一个支持各种生命形式的复杂食物网。此外，叶绿体是独特的，因为它们拥有自己的DNA，与细胞核的DNA分开。这一特征表明，它们可能起源于被原核生物包围的自由生活的原核生物，这种共生关系使得祖先真核细胞能够获得能量。这一理论被称为内共生理论，突显了叶绿体的进化重要性，并强调它们在复杂生命形式发展中的作用。除了在光合作用中的作用外，叶绿体还参与脂肪酸和氨基酸的合成，这些都是植物组织生长和修复所必需的。它们帮助生产可以保护植物免受食草动物和病原体侵害的次级代谢物。因此，叶绿体不仅满足植物的能量需求，还促进其整体健康和抵御环境压力的能力。随着我们面临气候变化和粮食安全等全球挑战，理解叶绿体的作用变得愈发重要。科学家们正在探索增强作物光合作用效率的方法，这可能导致在最小化水和肥料等资源使用的同时增加粮食生产。通过优化叶绿体的功能，我们也许能够开发出更可持续的农业实践，以支持人类需求和环境保护。总之，叶绿体不仅仅是简单的细胞器；它们对地球生命至关重要。它们利用阳光并将其转化为可用能量的能力对所有生物都有深远的影响。从支持食物链到影响全球碳循环，叶绿体的重要性不容小觑。随着我们继续研究这些非凡的结构，我们将揭示更多关于生态系统微妙平衡的知识，以及维护我们星球健康的重要性。通过欣赏叶绿体的作用，我们可以更好地理解生命的相互联系以及保护环境以惠及未来世代的可持续实践的必要性。